47650644 has 18 divisors (see below), whose sum is σ = 120450330. Its totient is φ = 15883536.

The previous prime is 47650607. The next prime is 47650649. The reversal of 47650644 is 44605674.

47650644 is a `hidden beast` number, since 4 + 7 + 6 + 5 + 0 + 644 = 666.

It can be written as a sum of positive squares in only one way, i.e., 45400644 + 2250000 = 6738^2 + 1500^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×47650644² = 4541167747229472, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1323629 = 47650644 / (4 + 7 + 6 + 5 + 0 + 6 + 4 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 47650599 and 47650608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47650649) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 661779 + ... + 661850.

It is an arithmetic number, because the mean of its divisors is an integer number (6691685).

Almost surely, 2^47650644 is an apocalyptic number.

It is an amenable number.

47650644 is an abundant number, since it is smaller than the sum of its proper divisors (72799686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

47650644 is a wasteful number, since it uses less digits than its factorization.

47650644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1323639 (or 1323634 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The square root of 47650644 is about 6902.9445890866. The cubic root of 47650644 is about 362.5402736071.

The spelling of 47650644 in words is "forty-seven million, six hundred fifty thousand, six hundred forty-four".